Several case series of repeat surgery for nasolacrimal obstruction have been reported. These studies have generally been retrospective, uncontrolled, unmasked, and conducted in single centers. These studies have also used differing definitions of treatment success, making it difficult to compare outcomes between the techniques. There is currently no accepted clinical practice for the management of these children. Clinicians choose among repeat probing, repeat probing with inferior turbinate infracture, multipass probing, balloon catheter dilation, and nasolacrimal duct intubation.